<div class="apiDetail">
	<div>
		<h2>
			<span>Function(treeId, treeNode, clickFlag)</span><span class="path">setting.callback.</span>beforeClick
		</h2>
		<h3>
			概述<span class="h3_info">[ 依赖 <span class="highlight_green">jquery.ztree.core</span> 核心 js ]
			</span>
		</h3>
		<div class="desc">
			<p></p>
			<div class="longdesc">
				<p>用于捕获单击节点之前的事件回调函数，并且根据返回值确定是否允许单击操作</p>
				<p>默认值：null</p>
			</div>
		</div>
		<h3>Function 参数说明</h3>
		<div class="desc">
			<h4>
				<b>treeId</b><span>String</span>
			</h4>
			<p>
				对应 zTree 的 <b class="highlight_red">treeId</b>，便于用户操控
			</p>
			<h4 class="topLine">
				<b>treeNode</b><span>JSON</span>
			</h4>
			<p>被单击的节点 JSON 数据对象</p>
			<h4 class="topLine">
				<b>clickFlag</b><span>Number</span>
			</h4>
			<p>节点被点击后的选中操作类型，详细看下表</p>
			<table width="100%" border="0" cellspacing="1" cellpadding="0">
				<thead>
					<tr>
						<td>clickFlag</td>
						<td title="是否允许多点选中">selectedMulti</td>
						<td title="是否按下 Ctrl 或 Cmd 键">autoCancelSelected<br />&&<br />event.ctrlKey / metaKey
						</td>
						<td title="节点当前选择状态">isSelected</td>
						<td>选中操作</td>
					</tr>
				</thead>
				<tbody>
					<tr>
						<td>1</td>
						<td>true</td>
						<td>false</td>
						<td>false</td>
						<td>普通选中</td>
					</tr>
					<tr>
						<td>1</td>
						<td>true</td>
						<td>false</td>
						<td>true</td>
						<td>普通选中</td>
					</tr>
					<tr>
						<td>2</td>
						<td>true</td>
						<td>true</td>
						<td>false</td>
						<td>追加选中</td>
					</tr>
					<tr>
						<td>0</td>
						<td>true</td>
						<td>true</td>
						<td>true</td>
						<td>取消选中</td>
					</tr>
					<tr>
						<td>1</td>
						<td>false</td>
						<td>false</td>
						<td>false</td>
						<td>普通选中</td>
					</tr>
					<tr>
						<td>1</td>
						<td>false</td>
						<td>false</td>
						<td>true</td>
						<td>普通选中</td>
					</tr>
					<tr>
						<td>1</td>
						<td>false</td>
						<td>true</td>
						<td>false</td>
						<td>普通选中</td>
					</tr>
					<tr>
						<td>0</td>
						<td>false</td>
						<td>true</td>
						<td>true</td>
						<td>取消选中</td>
					</tr>
				</tbody>
			</table>
			<h4 class="topLine">
				<b>返回值</b><span>Boolean</span>
			</h4>
			<p>返回值是 true / false</p>
			<p class="highlight_red">如果返回 false，zTree 将不会选中节点，也无法触发 onClick 事件回调函数</p>
		</div>
		<h3>setting & function 举例</h3>
		<h4>1. 禁止节点被选中</h4>
		<pre xmlns="">
			<code>function zTreeBeforeClick(treeId, treeNode, clickFlag) {
    return (treeNode.id !== 1);
};
var setting = {
	callback: {
		beforeClick: zTreeBeforeClick
	}
};
......</code>
		</pre>
	</div>
</div>